Activated carbon has the function of adsorpting impurities and odors, so it does have to dbe cleaned frequently. After having used for a period of time, just put the activated carbon under the sun to exposure and you can achieve the role of cleaning and re-use it; When the carbon becomes less, it shows that there is consumed.
Activated carbon maintenance:
If the activated carbon have been used for a certain of time, the adsorption capacity will reach a bottleneck, affecting its functions. So you ought to regularly achieve sun exposure in order to maintain the activated carbon dried, re-use, as well as reach the goal of long-term using.